Vaillant ecotec pro 28 boiler - F22 error?

[martine123]

Hi,

We have a problem with our ecotec pro 28 boiler - any help would be much appreciated!

There's no hot water coming out of the taps, and the system is showing error code F.22 - the manual says this means 'dry fire' or problem with the water pressure sensor. The pressure gauge has dropped to 0.4 bar.

If we turn the boiler off and on again, we get hot water for about a minute before it goes cold again.

I found a similar question where the person was advised to turn the valves on the inlet pipes to let water in, but I'm not sure where they are. I tried turning the twisty bits at either end of this bendy pipe:

Untitled

• martine123
• 15 Aug 2010
• 3

but nothing seemed to happen.

The pipes that feed in underneath the boiler look like this:

Untitled

• martine123
• 15 Aug 2010
• 2

Should I be turning the valves on one of these pipes instead?


Thanks!

 

[gas4you]

You should be able to fill the system by turning just the black lever in the top pic 90d.

Nothiong to do with the above, but is the ch flow valve opened fully, or is it just a kind of reflection making it look as though it is only open at 45d?

 

[tripkat]

I'm having the same difficulty. I can't find anything to turn on or off though as all the wires are hidden behind the cupboards or some tiling. the only things I can see are in these pictures below. The kickboard is sealed. Any suggestions?

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